Year	Measure
1800	963.4
1801	962.3
1802	961.2
1803	960.1
1804	959
1805	957.8
1806	956.7
1807	955.6
1808	954.5
1809	953.4
1810	952.3
1811	951.2
1812	950.1
1813	949
1814	947.9
1815	946.8
1816	945.7
1817	944.6
1818	943.5
1819	942.4
1820	941.3
1821	940.2
1822	939.1
1823	938
1824	936.9
1825	935.8
1826	934.7
1827	933.6
1828	932.6
1829	931.5
1830	930.4
1831	929.3
1832	928.2
1833	927.2
1834	926.1
1835	925
1836	923.9
1837	922.9
1838	921.8
1839	920.7
1840	919.6
1841	918.6
1842	917.5
1843	916.4
1844	915.4
1845	914.3
1846	913.3
1847	912.2
1848	911.1
1849	910.1
1850	909
1851	908
1852	906.9
1853	905.8
1854	904.8
1855	903.7
1856	902.7
1857	901.6
1858	900.6
1859	899.6
1860	898.5
1861	897.5
1862	896.4
1863	895.4
1864	894.3
1865	893.3
1866	892.3
1867	891.2
1868	890.2
1869	889.2
1870	888.1
1871	887.1
1872	886.1
1873	885
1874	884
1875	883
1876	881.9
1877	880.9
1878	879.9
1879	878.9
1880	877.9
1881	876.8
1882	875.8
1883	874.8
1884	873.8
1885	872.8
1886	871.8
1887	870.7
1888	869.7
1889	868.7
1890	867.7
1891	866.7
1892	865.7
1893	864.7
1894	863.7
1895	862.7
1896	861.7
1897	860.7
1898	859.7
1899	858.7
1900	857.7
1901	861
1902	864.2
1903	867.5
1904	870.8
1905	874.2
1906	877.5
1907	880.9
1908	884.2
1909	887.6
1910	891
1911	894.4
1912	922.1
1913	947.3
1914	979.4
1915	1134
1916	1098
1917	1202
1918	1281
1919	1349
1920	1161
1921	1238
1922	1124
1923	1190
1924	1183
1925	1170
1926	1199
1927	1236
1928	1230
1929	1151
1930	1077
1931	1070
1932	1059
1933	1267
1934	1251
1935	1349
1936	1459
1937	1595
1938	1664
1939	1489
1940	1666
1941	1675
1942	1652
1943	1662
1944	1577
1945	734.1
1946	742.6
1947	782.6
1948	841.6
1949	902.9
1950	947.5
1951	791.8
1952	846.2
1953	1093
1954	1153
1955	1217
1956	1277
1957	1391
1958	1569
1959	1514
1960	1604
1961	1680
1962	1641
1963	1620
1964	1630
1965	1663
1966	1644
1967	1670
1968	1693
1969	1659
1970	1710
1971	1711
1972	1741
1973	1762
1974	1792
1975	1854
1976	1860
1977	1893
1978	1817
1979	2023
1980	1894
1981	2079
1982	2186
1983	2143
1984	2210
1985	2125
1986	2109
1987	2144
1988	2199
1989	2258
1990	2076
1991	1973
1992	1745
1993	1619
1994	1605
1995	1442
1996	1393
1997	1230
1998	1267
1999	1377
2000	1287
2001	1368
2002	1375
2003	1405
2004	1410
2005	1464
2006	1461
2007	1392
2008	1427
2009	1407
2010	1393
2011	1397
2012	1393
2013	1392